Radiator fin



FIG. 1 is a perspective view of a radiator fin showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a top plan view thereof; and

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a left side elevational view thereof. 

The ornamental design for a radiator fin, as shown and described. 